Removed Debian 12 build; updated Debian 13 build to 13.6

Debian/debian-13.pkr.hcl

@@ -20,7 +20,7 @@ variable "proxmox_disk_storage" {
 
 source "proxmox-iso" "debian-13" {
   template_name            = "debian-13"
-  template_description     = "Debian 13.0, generated on ${timestamp()}"
+  template_description     = "Debian 13.6, generated on ${timestamp()}"
   vm_id                    = "209"
   boot_wait                = "10s"
   boot_key_interval        = "200ms"
@@ -56,8 +56,8 @@ source "proxmox-iso" "debian-13" {
 
   boot_iso {
     type                   = "scsi"
-    iso_url                = "https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-13.0.0-amd64-netinst.iso"
-    iso_checksum           = "sha256:e363cae0f1f22ed73363d0bde50b4ca582cb2816185cf6eac28e93d9bb9e1504"
+    iso_url                = "https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-13.6.0-amd64-netinst.iso"
+    iso_checksum           = "sha256:65273beed27b2df543b68b65630ba525cfbad8df2b12035732b2dff87d6664e7"
     iso_download_pve       = true
     iso_storage_pool       = "iso"
     unmount                = true